The use of the bispectrum for analysis dynamic parameters of rail fastening

Abstract

“Higher Order Statistics†(HOS) is extension of second-order characteristics such as the auto-correlation function and power spectrum. HOS analysis is emerging as a new powerful technique in signal analysis, offering insight into non-linear coupling between frequencies and potential applications in many areas where traditional linear analysis provides insufficient information. This contribution describes the HOS theory and possibilities application to experimental data acquisition from measurements of rail fastening parameters.